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[noun on-ley, awn-; verb on-ley, awn-] /noun ˈɒnˌleɪ, ˈɔn-; verb ɒnˈleɪ, ɔn-/
an overlay, especially one in relief.
Dentistry. an inlay that restores the occlusal surface of a tooth.
verb (used with object), onlaid, onlaying.
to place or mount (an onlay) on a surface, especially for decorative purposes.
Origin of onlay
1875-80; on + lay1, after verb phrase lay on Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for onlay
Historical Examples
  • It disturbs the breadth, which is so valuable a characteristic of onlay.

    Art in Needlework Lewis F. Day
  • Couched cord or filoselle is useful in covering the raw edge of the onlay, not so much masking the joints as making them sightly.

    Art in Needlework Lewis F. Day
onlay in Medicine

onlay on·lay (ŏn'lā')

  1. A cast restoration, usually made of gold, that is attached to the occlusal surface of a tooth.

  2. A bone graft applied to the exterior surface of the bone.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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